Maybe the problem is in the lines 704-706 of configure.in: UTF-8) SP_OPTIONS="SP_ENCODING=XML SP_CHARSET_FIXED=YES" ;;
This should be (I think):
UTF-8) SP_OPTIONS="SP_ENCODING=UTF-8 SP_CHARSET_FIXED=YES" ;;
Bug: http://bugs.php.net/bug.php?id=27604
That's most likely an error, but I've so far been able to generate correct chms in my box, so I think it's a locale-specific issue of the HTML Help Workshop and the mentioned part is irrelevant to the problem itself.
Moriyoshi
